Slowed down
Fig. 4.1 shows a cross section through the human heart showing the electro
conduct...
Biology, 26.03.2021 14:00 imaboss10986
Slowed down
Fig. 4.1 shows a cross section through the human heart showing the electro
conduction system
Fig. 4.1
(a) ) identify the structures labelled A and B.
(11) Describe how structures A, B, C and D shown on Fig. 41 initiate
and coordinate the cardiac cycle.
Answers: 3
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